Best riddles with simple answers

Three lives have I. Gentle enough to soothe the skin, Light enough to caress the sky, Hard enough to crack rocks.

What do you call a fairy that hasn't taken a bath?

I am not alive but I grow. I don't have lungs but I need air. What am I?

What goes through towns up hills but never moves?

There’s a key that opens no doors but fills your stomach, what key is it?

It can be cracked, it can be made, It can be told, it can be played. What is it?

What is the largest number you can write with just 3 digits?

I have all the knowledge you have. But I am small as your fist that your hands can hold me. Who am I?

What do you call a calf after it's six months old?

I have four legs. I live in Africa. I am big and grey. I live in the river. What am I?